Solar System (Ekusia)

The Solar System is the gravitationally bound system of the Sun and the objects that orbit it. It formed TBD billion years ago from the gravitational collapse of a giant interstellar molecular cloud. The vast majority (TBD%) of the system's mass is in the Sun, with most of the remaining mass contained in the planet Denos?. The three inner system planets—TBD, TBD2 and Ekusia are terrestrial planets, being composed primarily of rock and metal. The four giant planets of the outer system are substantially larger and more massive than the terrestrials. The two largest, Denos and Multua, are gas giants, being composed mainly of hydrogen and helium; the next two, Merkatos and Nirvana, are ice giants, being composed mostly of volatile substances with relatively high melting points compared with hydrogen and helium, such as water, ammonia, and methane. All seven planets have nearly circular orbits that lie near the plane of Ekusia's orbit, called the ecliptic.